Since I can't edit anymore the post, I'll rewrite everything here.
Hi.
First of all, the WD is mine, the Toshiba is of a friend, both drives decided to fail more or less in the same time

Both drives were used externally, the wd naturally in a 3.5" externally power supplied usb box, the toshiba in a 2,5" self (by usb itself) power supplied usb box.
Mine was standing in vertical and fallen very few times (for fallen i mean that from vertical it went horizontal) and almost when switched off, the toshiba instead, as much as my friend told me, fallen once when was unplugged (and so unpowered).
The matter is that when he gave me the drive, he said that it only became very slow, but unluckily when I got home, the drive fell from my desktop, again when unplugged (and unboxed) and now the heads bumps and it's not detected either by the usb adapter either by connecting it directly to a sata port.
Instead, my WD drive made weird rattling noise when used and working, but as soon as i accessed the files on it, it stopped rattling. So one day I tried to use HDDRegenerator to check for bad sectors, on a different computer connected directly to a sata port, with the hddreg generated USB Pen tool, and after some fixing nothing went bad. But after a few days, while trying to reuse the drive on its usb box, it started behaving like that and not being detected anymore.
I wonder if it's a matter of failed heads on both drive and what can I do to backup all the data, at least from my 1tb drive, that was quite full when failed

Would be enough to switch controller boards or should I try even to swtich heads?
I attach picture of both labels and control boards numbers, and two audio recordings of the hitting noises.
I can't attach the audio files, what can I do to attach them? I tried in 3 formats: wma, mp3 and wav, all to no avail.
Thank you for eventual useful answers.